Classification
300 - Social sciences
320 - Political science
900 - History & geography
330 - Economics
339
576 - Genetics & evolution
61
100 - Philosophy & psychology
49
301 - Sociology & anthropology
41
340 - Law
35
700 - The arts; fine & decorative arts
33
200 - Religion
27
600 - Technology
25
000 - Computer science, information & general works
21
333 - Economics of land & energy
21
370 - Education
20
140 - Specific philosophical schools
19
363 - Other social problems & services
17
380 - Commerce, communications & transportation
16
620 - Engineering & allied operations
16
630 - Agriculture & related technologies
16
800 - Literature & rhetoric
16
304 - Factors affecting social behavior
13
610 - Medicine & health
11
400 - Language
10
170 - Ethics
9
410 - Linguistics
7
581 - Specific topics in natural history
7
780 - Music
7
720 - Architecture
5
500 - Natural sciences & mathematics
4
530 - Physics
4
770 - Photography, photographs & computer art
4
120 - Epistemology, causation & humankind
3
297 - Islam, Babism & Bahai Faith
3
350 - Public administration & military science
3
364 - Criminology
3
361 - Social problems & social welfare in general
2
551 - Geology, hydrology & meteorology
2
658 - General management
2
160 - Logic
1
343 - Military, tax, trade & industrial law
1
360 - Social problems & services; associations
1
520 - Astronomy & allied sciences
1
540 - Chemistry & allied sciences
1
550 - Earth sciences
1
580 - Plants (Botany)
1
657 - Accounting
1
949 - Other parts of Europe
1